3 in 1 GPS Speedometer 85mm Gauge OLED Display 0 160MPH Odometer for RV Ship Car Boat 9 32V Black Features： 1、Main Functions: With steering indication function, headlight switch display, clearly display the single mileage, total mileage, COG heading function. 2、High Accuracy: With stepper motor drive pointer, accurate display of the engine speed, 7 color backlight adjustable, making it safe and reliable at night. 3、High Performance: The boat GPS speedometer has the advantages of high precision, quick location confirmation and short start up time. 4、Practical: The speedometer gauge indicating range is0‑160MPH, with cumulative number of engine hours of 0.0‑99999.9H. Suitable for all RVs, yachts, boats, motorcycles, cars. 5、Installation: Cut an 85mm (3 3/8in) hole in the panel and allow a clearance of 55mm (2 3/16in) behind the panel to fit the gauge. Put the gauge in the hole and screw down. Specification： Item Type: GPS Speedometer Material: ABS, stainless steel, anti fog glass Tachometer Display Range: 0-160MPH Engine Cumulative Hours: 0.0-99999.9H Backlight Color: 7 colors (red, yellow, orange, green, blue, purple, white) Working Voltage: DC 9-32V Installation Size: Approx. 85mm/3.35in Function Display: COG direction, single mileage, accumulated mileage Application: Suitable for RVs, yachts, fishing boats, ships, motorcycles, cars Package List： 1 x Speedometer 1 x GPS 1 x Manual